Intraspecific variation in plants can affect soil organisms. However, little is known about whether the magnitude of the effect depends on the degree of interaction with the roots. We analyzed effects ...

Documentation of morphologic variation within and among fossil species (and larger clades) provides fundamental data needed for studies of evolution, paleoecology, and the systematic foundation ...

This week, reading unnatural DNA, and young worm mothers explain a wriggly riddle. Your browser does not support the audio element. Plus, how young worm mothers may ...

Genetic variation within a population is measured according to the number of different alleles of all genes and the frequency with which they appear. Variation is high when there are many different ...

The phenotype of organisms is shaped by the interaction between environmental factors and their genetic constitution. A recent study by a team of population geneticists shows that fruit flies live in ...

The genes of an organism play an important role in the development of characteristic traits. However, even the traits of genetically identical clones that grow up under the same environmental ...

THERE have been several studies on the interrelation of nose and skin bacteria in unisolated groups of human beings, 1–3 but little has been written about variations in the micro-organisms of the nose ...

The abundant diversity of characteristics within species likely helped fuel the proliferation and evolution of an odd-looking creature that emerged from an unprecedented explosion of life on Earth ...

In nature, ecosystems are tightly linked through the flow of organisms, detritus, and nutrients across boundaries arbitrarily imagined by humans. These systems are deeply in tune with seasonal changes ...